Snorkeling & Sightseeing Tours around Koh Samui

Welcome to Grand Sea Discovery

Our main business is operating snorkeling tours and trips around Koh Samui, with destinations such as Koh Tao & Koh Nang Yuan, we do offer the best tour in samui and the beautiful treasure Angthong National Marine Park.

The beautiful island of Koh Samui lies in the waters of the Gulf of Thailand and attracts visitors all year round. There are plenty of beaches, restaurants, bars and shops to explore as well as some more authentic Thai experiences with trips to the waterfalls and elephant trekking.

Ko Samui is in the Gulf of Thailand, about 35 km northeast of Surat Thani town (9°N, 100°E). It is the most significant island in the Chumphon Archipelago. The island measures some 25 km at its widest point. To the north are the populated resort islands of Ko Pha-ngan, Ko Tao, and Ko Nang Yuan.

Snorkeling Tours & Sightseeing

Our popular tours & trips are:

Koh Tao & Koh Nang Yuan, known for the beautiful, colorful coral reefs and crystal clear water. Perfect to enjoy a day of snorkeling while staying on Koh Samui.

Angthong National Marine Park , the treasure of 42 islands with corals reefs, emerald lake and beautiful beaches. This activity gives You the possibility to snorkel, kayak, relax on the beach or hike to the iconic viewpoint overlooking the 42 islands.

Koh Phangan is an island in southeast Thailand that’s renowned for its monthly Full Moon Party. This boisterous night-long celebration, which is tied to the lunar calendar, draws revelers to its southeastern peninsula, Haad Rin. Most festivities center on Sunrise Beach, whose beach bungalows attract a backpacker crowd. On the north coast lie quieter, white-sand beaches including Hat Khuat and Hat Thian.

Full Moon Party & Private Charter Boat

Beside the daily running tours, we are running the transfer business to the worlds most famous party on Koh Phangan – the Full Moon Party! If You book with us, You can ensure, that the transfer from Koh Samui and back from Koh Phangan is safe!

For smaller groups or individuals, we have our Private Charter Boat Service, where you are able to book your own boat, operated by our experienced crew. The destinations we are running this service for are: Koh Tao & Koh Nang Yuan, Angthong Marine Park, Koh Phangan or Koh Tan / Koh Madsum.

Koh Tan and Koh Madsum give you a chance to explore two real desert islands. White sand beaches and crystal clear waters with colourful coral reefs, abundant with sea-life, make for a real escape from reality. There are only limited numbers of tour companies with permission to take groups. With Grand Sea Tours, You have the privilege to visit those 2 beautiful islands in the south of Koh Samui.

Did a day trip with a speedboat to Ang Thong National Marine Park. The weather was not on our favour and for that we need to alter plans, but anyway the trip was well organised. Nothing to complain, except for the weather, but that's just bad luck.
This was a well organised and varied trip - we took our 5 year old twins, who were the only children there (our group of about 20 had all ages, mainly people in their 20’s-30’s), and they had an amazing, memorable time, as did we. One crew member, Jackson, made sure that we were well looked after, particularly helping carry one of the kids up the very steep steps to the viewpoint & later building sandcastles with them on the beach - he went above & beyond! Would thoroughly recommend for anyone, good for anyone from families with adventurous kids to single travellers to those enjoying retirement!
Nous sommes deux couples d’amis qui sont allés faire le tour des 42 îles. Les employés sont attentionnés et nous ont donnés de l’eau toute la journée et nous demandais constamment si nous avions le mal de mer. Nous sommes arrivés en retard puisque nous voulions s’y rendre par nous mêmes, mais nous nous sommes perdus suite aux divers recommandations des locaux. Bref, prenez le transport de votre hôtel pour aller à votre activité, conseil d’amis ! Nous avons appellés et ils nous ont envoyé un auto nous chercher, cetait plus que parfait comme service. Le snorkling est correct, l’eau est trouble, mais bien quand même ! La visite des iles est parfaite, il y a du petit hiking, c’est vraiment de beaux points de vus. Sur le retour, nous avons eu de grosses vagues, le personnel était plus que parfait, surtout le conducteur du bateau. Bref, on reprendrait la même compagie pour l’excursion.
Super journée! Des paysages paradisiaques ! Un tour de bateau au top avec un super capitaine !! Un guide "jackson" vraiment adorable souriant, à l'écoute et pro!🙏 possibilités de farniente ou de moments sportifs! Bon timing entre les différents bateaux sur les différents sites. Seul petit bémol..le moment snorkeling..ce n'est pas l'atout de cette journée mais pour tout le reste vraiment ça vaut le coup! Pas déçu ! Et avec un peu de chance la vue des singes 😉😉 un grand merci à cette équipe pour leur gentillesse! Bonne continuation a vous.
Tony C
Tony C
I have to say this was one of the worst trips i have ever done. They did not inform me of the pickup time so had to hang around for 75 minutes wondering what time they were turning up. About 45 people were rammed on the boat so there was hardly anywhere to sit. Snorkelling was good but there must have been about 200 people in a small area. Kayaking was an ordeal of endurance in the blistering heat. We staggered to shore exhausted. After a pretty average lunch huge storm clouds gathered on the horizon. The captain proceeded to steer us into the storm to take us to a viewpoint of the blue lagoon. At this point the rains started to hammer down and we had to take shelter before returning to the boat. The captain then seemed to be trying to load google maps for the return journey while we hurtled at top speed into the grey mass of rain and spray. We thankfully returned to the hotel in one piece.

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